Perhaps you should try some spelling variations:
thi hanh » thi thanh
cam thuc » am thuc, nam thuc, can thuc
sach thi » sach thu, sach tai, sach thieu
hanh lam » thanh lap, hanh kem, hanh va
va triet » va trien, ve triet, cua triet
tu sach » thu sach, su sach, te sach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
cam thu » nam thu, cac thu, ca thu
va hanh » van hanh, va thanh, va danh
thiet » thieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thi hanh xa hoi. hieu ve ((cam thuc) OR (cam thu)) va hanh lam ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. hieu ve ((cam thuc) OR (cam thu)) va hanh lam ((va triet) OR (va thiet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi hanh xa hoi. hieu ve ((cam thuc) OR (cam thu)) va hanh lam ((va triet) or (va thiet))*".